The reason why the Hijri calendar is of specific importance to Muslims is that all significant dates of concern to a Muslim, and all rulings of Islam related to specific dates or time frames are based on the Hijri calendar.
The fast of Ramadan, the yearly cycle of Zakat, the dates of Hajj, the ages defined in discussions on puberty, all celebrations throughout the year, and all supererogatory fasts throughout the year are based on the Hijri calendar. Likewise, the dates of all of the events in the Prophetâs life, the lives of his companions, and all generations of Islam throughout history are based on the Hijri calendar.
Additionally, some Muslim countries continue to use the Hijri calendar as their official calendar. Collectively, all of these reasons make the Hijri calendar of central importance in a Muslims life.
In this lecture, Shaykh Abdul Wahab Saleem discusses the importance of the Hijri calendar in detail and highlighted the virtues and rituals specific to the month of Muharram